As in the Steve Jackson "RPG" 'Toon' ?? I played this quite a bit when I was a kid. fun stuff. My main character was a little green four-legged frog with a super-stretchy prehensile tongue of near-infinite length, his name was 'Rogger Ribbit' (doh!). His biggest accomplishment was when he fell off a cliff, pulled a stop sign out of his pocket (you can pull any sort of sign out of your Back Pocket (TM) at any time, so says the book), rolled a successful 'fast talk' roll, and convincing the ground to STOP!!!! It was so fun to play a game with no rules, just like 'Calvinball' in many ways.

Kill Dr. Lucky is a multiplayer game where you try to kill
Dr. Lucky. Players try to get the prospective victim alone
with them (and out of sight of anyone else -- can't have
witnesses) and then off him. Sort of like the prequel to
a game of Clue.

Make Dr. Lucky Fall Down is a crossover variant that was
published on Pyramid. The operating rules are Toon; the
objective is to make Dr. Lucky fall down. You still have
to avoid witnesses, but boggled Toons can be ignored.
Dr. Lucky has Luck-8.